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Szczepan Bialek wrote:
"K1TTT" wrote ... On Aug 8, 6:23 pm, "Szczepan Bialek" wrote: In Ampere electroDYNAMICS no magnetism. The XXI century will be the century of Ampere ElectroDYNAMICS. It is the common opinion. what good is a theory without magnetism. it obviously doesn't fit the real world as we know it today. maybe it is your opinion, but its not anywhere i have heard of. Gravity force, electrostatic force and magnetic force are the real world for the most people. But not for scientists. Utter, babbling nonsense. They know that in the space is the place for the one of them. So step by step they decrease the number of them. The first was Aepinus who proved that gravity and electrostatic are the same. The last step was made by Ampere who build the artifical magnet - solenoid. It means that magnetism is an ilussion like gravity. The all forces are electric. Word salad and gibberish. ampere's theory dates from almost 200 years ago and was the predecessor of electromagnetics, so you seem to have taken another step backwards, now you are almost 2 centuries out of date. Heaviside was not scientists and he has taken another step backwards to Poisson's fluids. He did not understand Maxwell and Stokes. Teachers must be in "real world" and wait for the end of works on the Unification of gravity, electricity and magnetism (they are pending). S* More word salad and gibberish. -- Jim Pennino Remove .spam.sux to reply. |
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On Aug 10, 7:51*am, "Szczepan Bialek" wrote:
"K1TTT" ... On Aug 8, 6:23 pm, "Szczepan Bialek" wrote: In Ampere electroDYNAMICS no magnetism. The XXI century will be the century of Ampere ElectroDYNAMICS. It is the common opinion. what good is a theory without magnetism. *it obviously doesn't fit the real world as we know it today. *maybe it is your opinion, but its not anywhere i have heard of. Gravity force, electrostatic force and magnetic force are the real world for the most people. But not for scientists. They know that in the space is the place for the one of them. So step by step they decrease the number of them. The first was Aepinus who proved that gravity and electrostatic are the same. The last step was made by Ampere who build the artifical magnet - solenoid. It means that magnetism is an ilussion like gravity. The all forces are electric. ampere's theory dates from almost 200 years ago and was the predecessor of electromagnetics, so you seem to have taken another step backwards, now you are almost 2 centuries out of date. Heaviside was not scientists and he has taken another step backwards to Poisson's fluids. He did not understand Maxwell and Stokes. Teachers must be in "real world" and wait for the end of works on the Unification of gravity, electricity and magnetism (they are pending). S* it sure would be nice if gravity and electrostatics were the same force, would make it easy to build antigravity device, just hook up a van de graf generator and fly away!!! you really are digging up some old and incorrect theories from long ago... keep digging and you'll get back to the 4 basic elements, then you will know everything. |
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"K1TTT" wrote ... On Aug 10, 7:51 am, "Szczepan Bialek" wrote: Teachers must be in "real world" and wait for the end of works on the Unification of gravity, electricity and magnetism (they are pending). S* it sure would be nice if gravity and electrostatics were the same force, would make it easy to build antigravity device, just hook up a van de graf generator and fly away!!! Moon dust fly away. On the Earth the soap-bubble levitates if are charged. Earth and Moon have the excess of electrons. you really are digging up some old and incorrect theories from long ago... keep digging and you'll get back to the 4 basic elements, then you will know everything. Bill Baka wrote: "Some of you guys need a 'TRUE' history lesson." In the history are the reasons for which Maxwell did the hipothesis and and why it was discarded. Not as a whole. The math for solid body is in using. In a solid body are stress and strains. In the history no the school version by Heaviside. It is only in your "real world" and in textbooks. S* |
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Szczepan Bialek wrote:
"K1TTT" wrote ... On Aug 10, 7:51 am, "Szczepan Bialek" wrote: Teachers must be in "real world" and wait for the end of works on the Unification of gravity, electricity and magnetism (they are pending). S* it sure would be nice if gravity and electrostatics were the same force, would make it easy to build antigravity device, just hook up a van de graf generator and fly away!!! Moon dust fly away. On the Earth the soap-bubble levitates if are charged. Earth and Moon have the excess of electrons. Babbling word salad. you really are digging up some old and incorrect theories from long ago... keep digging and you'll get back to the 4 basic elements, then you will know everything. Bill Baka wrote: "Some of you guys need a 'TRUE' history lesson." In the history are the reasons for which Maxwell did the hipothesis and and why it was discarded. Not as a whole. The math for solid body is in using. In a solid body are stress and strains. In the history no the school version by Heaviside. It is only in your "real world" and in textbooks. S* More babbling word salad. Seek medical help. -- Jim Pennino Remove .spam.sux to reply. |
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On 08/05/2010 06:35 PM, tom wrote:
On 8/5/2010 7:37 PM, Bill Baka wrote: On 08/05/2010 05:13 PM, tom wrote: On 8/5/2010 2:38 AM, Szczepan Bialek wrote: wrote . net... On 8/4/2010 2:45 AM, Szczepan Bialek wrote: Now everybody from you can measure the electron emission and heat emission. I was expected that you (radio people) know the results. Actually we do. You, who believe the 200 and 100 year old myths, don't believe us. And then you prattle on about us not knowing of what we speak when it is you who do not. Tesla wrote in XX century that EM is a myth. I simply agree with him. Tell me then who know better how the radio works: Tesla or you? S* Me. *t I hate to break in on private arguments, but Tesla was one of the smartest people to ever walk this earth. Are You? He invented Radio, but Marconi took the credit, using at least 6 of Tesla's patents. I can rant on Edison and Daguerre, but that gets long. Some of you guys need a 'TRUE' history lesson. Bill Baka, Listener only, since I rent these days. Had a 1st Class Radiotelephone with Marine RADAR, P1-12-24966, but gave it up some years back when they decided to do away with the first class distinction. Different numbers, but hard work to get anyway. I was specifically responding to the part where it is claimed that Tesla said EM is a myth. I feel quite safe, thanks. But I wouldn't have debated alternating current motors with Tesla. No sir. *t I am not arguing the obvious, just that Tesla was a genius before his time. Edison had some creativity but mostly stole other people's inventions and made them work for commercially viable products. He wanted to distribute DC power but Tesla wanted nothing to do with it so he became allied with Western House who knew that AC motors were the way to go. Since Edison went with D.C. and then found out it was only good at the local level he lost out. It took years but we can all see the effects by looking at those million volt transmission towers. I climbed one about 15 years ago and all I could hear was the crackling around me. Let Edison try to convert DC at that level. Bill Baka |
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On 08/06/2010 12:42 AM, Szczepan Bialek wrote:
wrote . net... On 8/5/2010 7:37 PM, Bill Baka wrote: On 08/05/2010 05:13 PM, tom wrote: On 8/5/2010 2:38 AM, Szczepan Bialek wrote: Tesla wrote in XX century that EM is a myth. I simply agree with him. Tell me then who know better how the radio works: Tesla or you? Me. I hate to break in on private arguments, but Tesla was one of the smartest people to ever walk this earth. Are You? He invented Radio, but Marconi took the credit, using at least 6 of Tesla's patents. I can rant on Edison and Daguerre, but that gets long. Some of you guys need a 'TRUE' history lesson. Bill Baka, Listener only, since I rent these days. Had a 1st Class Radiotelephone with Marine RADAR, P1-12-24966, but gave it up some years back when they decided to do away with the first class distinction. Different numbers, but hard work to get anyway. I was specifically responding to the part where it is claimed that Tesla said EM is a myth. I feel quite safe, thanks. Nikola Tesla wrote: " I showed that the universal medium is a gaseous body in which only longitudinal pulses can be propagated, involving alternating compressions and expansions similar to those produced by sound waves in the air. Thus, a wireless transmitter does not propagate Hertz waves, which are a myth, but sound waves in the ether, behaving in every respect like those in the air, except that, owing to the great elastic force and extremely small density of the medium, their speed is that of light." Bill Baka wrote: "Some of you guys need a 'TRUE' history lesson." There is also wrote that EM wrote Heaviside not Maxwell. Maxwell's hypothesis was quite different. There were the molecullar magnetic vortices. Inside the solenoid were millions of them. They rotate the polarisation plane. What rotate it in Heaviside EM? Inside the solenoid is the flux. Any rotation. In our textbooks is wrote "whats a pity that to teaching was choosen Heaviside not Ampere". But Ampere is too sophisticated for students. So, "I feel quite safe, thanks." S* I only commented on Tesla being a world smarter than Edison and did not intend to start an off topic war. P.S. Philo T. Farnsworth invented television, not RCA, who just ripped him off. |
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On 08/05/2010 07:23 PM, tom wrote:
On 8/5/2010 7:37 PM, Bill Baka wrote: On 08/05/2010 05:13 PM, tom wrote: On 8/5/2010 2:38 AM, Szczepan Bialek wrote: wrote . net... On 8/4/2010 2:45 AM, Szczepan Bialek wrote: Now everybody from you can measure the electron emission and heat emission. I was expected that you (radio people) know the results. Actually we do. You, who believe the 200 and 100 year old myths, don't believe us. And then you prattle on about us not knowing of what we speak when it is you who do not. Tesla wrote in XX century that EM is a myth. I simply agree with him. Tell me then who know better how the radio works: Tesla or you? S* Me. *t I hate to break in on private arguments, but Tesla was one of the smartest people to ever walk this earth. Are You? He invented Radio, but Marconi took the credit, using at least 6 of Tesla's patents. I can rant on Edison and Daguerre, but that gets long. Some of you guys need a 'TRUE' history lesson. Bill Baka, Listener only, since I rent these days. Had a 1st Class Radiotelephone with Marine RADAR, P1-12-24966, but gave it up some years back when they decided to do away with the first class distinction. Different numbers, but hard work to get anyway. Just noticed the renter part. I've been renting for 35 years and haven't been too seriously constrained for most of it. And by not seriously constrained I mean 4 over 4 yagis at 25 and 37 feet with 1000 watts on 6m amongst other things. If you work with your landlord you can often get permission for a lot. And the right city helps, too. tom K0TAR You are obviously not renting from Herr Commandant Earl Kennedy. He doesn't allow **** except for maybe a long wire run through the trees. If he can see it, he says take it down. I can't wait to move to a house that is farther out and he doesn't own. Bill Baka |
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On 08/10/2010 11:29 PM, Szczepan Bialek wrote:
wrote ... On Aug 10, 7:51 am, "Szczepan wrote: Teachers must be in "real world" and wait for the end of works on the Unification of gravity, electricity and magnetism (they are pending). S* it sure would be nice if gravity and electrostatics were the same force, would make it easy to build antigravity device, just hook up a van de graf generator and fly away!!! Moon dust fly away. On the Earth the soap-bubble levitates if are charged. Earth and Moon have the excess of electrons. you really are digging up some old and incorrect theories from long ago... keep digging and you'll get back to the 4 basic elements, then you will know everything. Bill Baka wrote: "Some of you guys need a 'TRUE' history lesson." I didn't start this to be a flame war, but I should have known. As for really high magnetic fields they have levitated a mouse in the lab with about 5 Teslas interacting with the water in his body. Bill Baka In the history are the reasons for which Maxwell did the hipothesis and and why it was discarded. Not as a whole. The math for solid body is in using. In a solid body are stress and strains. In the history no the school version by Heaviside. It is only in your "real world" and in textbooks. S* |
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Bill Baka wrote:
On 08/05/2010 06:35 PM, tom wrote: On 8/5/2010 7:37 PM, Bill Baka wrote: On 08/05/2010 05:13 PM, tom wrote: On 8/5/2010 2:38 AM, Szczepan Bialek wrote: wrote . net... On 8/4/2010 2:45 AM, Szczepan Bialek wrote: Now everybody from you can measure the electron emission and heat emission. I was expected that you (radio people) know the results. Actually we do. You, who believe the 200 and 100 year old myths, don't believe us. And then you prattle on about us not knowing of what we speak when it is you who do not. Tesla wrote in XX century that EM is a myth. I simply agree with him. Tell me then who know better how the radio works: Tesla or you? S* Me. *t I hate to break in on private arguments, but Tesla was one of the smartest people to ever walk this earth. Are You? He invented Radio, but Marconi took the credit, using at least 6 of Tesla's patents. I can rant on Edison and Daguerre, but that gets long. Some of you guys need a 'TRUE' history lesson. Bill Baka, Listener only, since I rent these days. Had a 1st Class Radiotelephone with Marine RADAR, P1-12-24966, but gave it up some years back when they decided to do away with the first class distinction. Different numbers, but hard work to get anyway. I was specifically responding to the part where it is claimed that Tesla said EM is a myth. I feel quite safe, thanks. But I wouldn't have debated alternating current motors with Tesla. No sir. *t I am not arguing the obvious, just that Tesla was a genius before his time. Edison had some creativity but mostly stole other people's inventions and made them work for commercially viable products. He wanted to distribute DC power but Tesla wanted nothing to do with it so he became allied with Western House who knew that AC motors were the way to go. Since Edison went with D.C. and then found out it was only good at the local level he lost out. It took years but we can all see the effects by looking at those million volt transmission towers. I climbed one about 15 years ago and all I could hear was the crackling around me. Let Edison try to convert DC at that level. Bill Baka HVDC distribution systems over long distances are not that uncommon. http://en.wikipedia.org/wiki/High-vo...direct_current The Pacific DC Intertie from Celilo, Oregon to Sylmar, California is just under 2,000 km long and runs at .5 MV. -- Jim Pennino Remove .spam.sux to reply. |
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On Aug 11, 8:46*pm, Bill Baka wrote:
On 08/05/2010 06:35 PM, tom wrote: On 8/5/2010 7:37 PM, Bill Baka wrote: On 08/05/2010 05:13 PM, tom wrote: On 8/5/2010 2:38 AM, Szczepan Bialek wrote: wrote use.net... On 8/4/2010 2:45 AM, Szczepan Bialek wrote: Now everybody from you can measure the electron emission and heat emission. I was expected that you (radio people) know the results. Actually we do. You, who believe the 200 and 100 year old myths, don't believe us. And then you prattle on about us not knowing of what we speak when it is you who do not. Tesla wrote in XX century that EM is a myth. I simply agree with him.. Tell me then who know better how the radio works: Tesla or you? S* Me. *t I hate to break in on private arguments, but Tesla was one of the smartest people to ever walk this earth. Are You? He invented Radio, but Marconi took the credit, using at least 6 of Tesla's patents. I can rant on Edison and Daguerre, but that gets long. Some of you guys need a 'TRUE' history lesson. Bill Baka, Listener only, since I rent these days. Had a 1st Class Radiotelephone with Marine RADAR, P1-12-24966, but gave it up some years back when they decided to do away with the first class distinction. Different numbers, but hard work to get anyway. I was specifically responding to the part where it is claimed that Tesla said EM is a myth. I feel quite safe, thanks. But I wouldn't have debated alternating current motors with Tesla. No sir. *t I am not arguing the obvious, just that Tesla was a genius before his time. Edison had some creativity but mostly stole other people's inventions and made them work for commercially viable products. He wanted to distribute DC power but Tesla wanted nothing to do with it so he became allied with Western House who knew that AC motors were the way to go. Since Edison went with D.C. and then found out it was only good at the local level he lost out. It took years but we can all see the effects by looking at those million volt transmission towers. I climbed one about 15 years ago and all I could hear was the crackling around me. Let Edison try to convert DC at that level. Bill Baka well, actually edison was right... and many long distance transmission lines today are DC at up to +/- 600kv, that will put a crackle in your snap and pop! There are also places where interconnects between major AC systems are done using back to back AC/DC converters so that the systems can be isolated due to voltage or frequency control issues. don't count out large dc motors either, our submarines have been using them forever... even nuclear subs have dc propulsion systems. All solar panels start as DC, as are most of the storage systems for them, and don't forget plugin hybrid or all electric vehicles, most all of them are dc powered. There is also a new move to use DC distribution in large data centers to reduce heat from transformers and simplify backup power systems. most subway systems and electric rail i believe are also dc powered. and believe it or not, there was still a block in nyc that was provided with dc by ConEd until 2007, and as i understand it they had to provide custom rectifiers for some equipment that was still in use so they could retire the rest of that system. |
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wrote ... Bill Baka wrote: HVDC distribution systems over long distances are not that uncommon. http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. With monopolar transmission the choice of polarity of the energized conductor leads to a degree of control over the corona discharge. In particular, the polarity of the ions emitted can be controlled, which may have an environmental impact on particulate condensation. (particles of different polarities have a different mean-free path.) Negative coronas generate considerably more ozone than positive coronas," But what it works in your antennas. S* |
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On Aug 12, 6:09*am, "Szczepan Białek" wrote:
.... Bill Baka wrote: HVDC distribution systems over long distances are not that uncommon. http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. With monopolar transmission the choice of polarity of the energized conductor leads to a degree of control over the corona discharge. *In particular, the polarity of the ions emitted can be controlled, which may have an environmental impact on particulate condensation. (particles of different polarities have a different mean-free path.) Negative coronas generate considerably more ozone than positive coronas," But what it works in your antennas. S* your antennas do not use DC. |
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"Szczepan Bia?ek" wrote:
wrote ... Bill Baka wrote: HVDC distribution systems over long distances are not that uncommon. http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. With monopolar transmission the choice of polarity of the energized conductor leads to a degree of control over the corona discharge. In particular, the polarity of the ions emitted can be controlled, which may have an environmental impact on particulate condensation. (particles of different polarities have a different mean-free path.) Negative coronas generate considerably more ozone than positive coronas," Whoopee, you can cut and paste from a web page, what a genius. But what it works in your antennas. S* It has nothing to do with antennas, moron. -- Jim Pennino Remove .spam.sux to reply. |
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On Aug 12, 8:54*pm, wrote:
"Szczepan Bia?ek" wrote: .... Bill Baka wrote: HVDC distribution systems over long distances are not that uncommon. http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. With monopolar transmission the choice of polarity of the energized conductor leads to a degree of control over the corona discharge. *In particular, the polarity of the ions emitted can be controlled, which may have an environmental impact on particulate condensation. (particles of different polarities have a different mean-free path.) Negative coronas generate considerably more ozone than positive coronas," Whoopee, you can cut and paste from a web page, what a genius. But what it works in your antennas. S* It has nothing to do with antennas, moron. -- Jim Pennino Remove .spam.sux to reply. maybe he does try to use dc on his antennas? kind of low data rate, but it would suffice for anything logical he had to say. |
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"K1TTT" wrote ... On Aug 12, 8:54 pm, wrote: "Szczepan Bia?ek" wrote: http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. But what it works in your antennas. S* maybe he does try to use dc on his antennas? kind of low data rate, but it would suffice for anything logical he had to say. Your antenna is a high voltage AC system. The loss is a loss of electrons. Try to measure it. S* |
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On Aug 13, 8:42*am, "Szczepan Bialek" wrote:
*"K1TTT" ... On Aug 12, 8:54 pm, wrote: "Szczepan Bia?ek" wrote: http://en.wikipedia.org/wiki/High-vo...direct_current " Due to the space charge formed around the conductors, an HVDC system may have about half the loss per unit length of a high voltage AC system carrying the same amount of power. But what it works in your antennas. S* maybe he does try to use dc on his antennas? *kind of low data rate, but it would suffice for anything logical he had to say. Your antenna is a high voltage AC system. The loss is a loss of electrons. Try to measure it. S* there is no net charge build up on an antenna due to rf. |
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Szczepan Bialek wrote:
Your antenna is a high voltage AC system. No, it isn't. The loss is a loss of electrons. No, it isn't. Try to measure it. S* Measure what, your babbling ignorance? -- Jim Pennino Remove .spam.sux to reply. |
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"K1TTT" wrote ... On Aug 13, 8:42 am, "Szczepan Bialek" wrote: Your antenna is a high voltage AC system. The loss is a loss of electrons. Try to measure it. there is no net charge build up on an antenna due to rf. So we are at the beginning. Try then to work without ground. S* |
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On Aug 13, 5:19*pm, "Szczepan Bialek" wrote:
*"K1TTT" ... On Aug 13, 8:42 am, "Szczepan Bialek" wrote: Your antenna is a high voltage AC system. The loss is a loss of electrons. Try to measure it. there is no net charge build up on an antenna due to rf. So we are at the beginning. Try then to work without ground. S* antennas work just fine without a ground. how do they work in airplanes? how about spacecraft? yes, i know, you like plasmas that provide the free electrons... but you are wrong. take a transmitter, encase it in rubber, put it in a vacuum chamber and pump out all the air, and you will still receive it. |
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"K1TTT" wrote ... On Aug 13, 5:19 pm, "Szczepan Bialek" wrote: So we are at the beginning. Try then to work without ground. antennas work just fine without a ground. how do they work in airplanes? how about spacecraft? yes, i know, you like plasmas that provide the free electrons... but you are wrong. take a transmitter, encase it in rubber, put it in a vacuum chamber and pump out all the air, and you will still receive it. See at the fig. 1: http://amasci.com/tesla/tmistk.html Can it work without Gnd? You can use a chassis. Transmitter is only a oscillating pump. Such must has a tank. S* |
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Szczepan Bialek wrote:
"K1TTT" wrote ... On Aug 13, 8:42 am, "Szczepan Bialek" wrote: Your antenna is a high voltage AC system. The loss is a loss of electrons. Try to measure it. there is no net charge build up on an antenna due to rf. So we are at the beginning. Try then to work without ground. S* Antennas work just fine without ground. Have you ever heard of airplanes, radiosondes and spacecraft? -- Jim Pennino Remove .spam.sux to reply. |
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Szczepan Bialek wrote:
"K1TTT" wrote ... On Aug 13, 5:19 pm, "Szczepan Bialek" wrote: So we are at the beginning. Try then to work without ground. antennas work just fine without a ground. how do they work in airplanes? how about spacecraft? yes, i know, you like plasmas that provide the free electrons... but you are wrong. take a transmitter, encase it in rubber, put it in a vacuum chamber and pump out all the air, and you will still receive it. See at the fig. 1: http://amasci.com/tesla/tmistk.html Can it work without Gnd? You can use a chassis. Transmitter is only a oscillating pump. Such must has a tank. S* Gibberish and nonsense based on ancient crap. Connect an RF source through a transformer with the secondary connected to a dipole and hang it from a balloon; works fine and no ground or chassis. -- Jim Pennino Remove .spam.sux to reply. |
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On Aug 13, 5:55*pm, "Szczepan Bialek" wrote:
*"K1TTT" ... On Aug 13, 5:19 pm, "Szczepan Bialek" wrote: So we are at the beginning. Try then to work without ground. antennas work just fine without a ground. *how do they work in airplanes? *how about spacecraft? *yes, i know, you like plasmas that provide the free electrons... but you are wrong. *take a transmitter, encase it in rubber, put it in a vacuum chamber and pump out all the air, and you will still receive it. See at the fig. 1:http://amasci.com/tesla/tmistk.html Can it work without Gnd? You can use a chassis. Transmitter is only a oscillating pump. Such must has a tank. S* the best quote from that web page: "electromagnetism is electromagnetism", nuff said. |
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wrote ... Szczepan Bialek wrote: Transmitter is only a oscillating pump. Such must has a tank. Gibberish and nonsense based on ancient crap. Connect an RF source through a transformer with the secondary connected to a dipole and hang it from a balloon; works fine and no ground or chassis. Start thinking. The dipole is a very long wire. The electrons are emitted from the ends only. The rest of the wire is the chassis. The very short dipole (0.05 wavelengh) should not work fine without ground. All antennas are the same: "In conventional ICP (or TCP) reactors, a rf power is inductively coupled to an antenna placed outside a plasma vessel. Such an external coupling system is known to have several disadvantages. In order to avoid these disadvantages, a new internal coupling system has been developed in which a bare metal antenna is directly immersed in a plasma, thus forming a full metal reactor. This is accomplished by generating magnetic field lines around an antenna conductor, which effectively suppress the electron loss at the antenna and hence suppress the anomalous rise of plasma potential. Magnetic fields near the antenna are formed by superposing a dc current on a rf current along the antenna. This type of ICP enables rf discharges at rather low pressures such as ?3×10-4 Torr due to the magnetron effect. Other characteristics of internal metal antennas are also discussed". "the electron loss" and "the anomalous rise of plasma potential." apply to all antennas. S* |
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On Aug 14, 8:03*am, "Szczepan Białek" wrote:
.... Szczepan Bialek wrote: Transmitter is only a oscillating pump. Such must has a tank. Gibberish and nonsense based on ancient crap. Connect an RF source through a transformer with the secondary connected to a dipole and hang it from a balloon; works fine and no ground or chassis. Start thinking. The dipole is a very long wire. The electrons are emitted from the ends only. The rest of the wire is the chassis. The very short dipole *(0.05 wavelengh) should not work fine without ground. All antennas are the same: "In conventional ICP (or TCP) reactors, a rf power is inductively coupled to an antenna placed outside a plasma vessel. Such an external coupling system is known to have several disadvantages. In order to avoid these disadvantages, a new internal coupling system has been developed in which a bare metal antenna is directly immersed in a plasma, thus forming a full metal reactor. This is accomplished by generating magnetic field lines around an antenna conductor, which effectively suppress the electron loss at the antenna and hence suppress the anomalous rise of plasma potential. Magnetic fields near the antenna are formed by superposing a dc current on a rf current along the antenna. This type of ICP enables rf discharges at rather low pressures such as ?3×10-4 Torr due to the magnetron effect. Other characteristics of internal metal antennas are also discussed". "the electron loss" and "the anomalous rise of plasma potential." apply to all antennas. S* no they don't. that discusses a rather unique situation of an antenna in a very low pressure plasma. another case where google supplied irrelevant information because of your ignorance of the actual physics involved. |
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"Szczepan Bia?ek" wrote:
wrote ... Szczepan Bialek wrote: Transmitter is only a oscillating pump. Such must has a tank. Gibberish and nonsense based on ancient crap. Connect an RF source through a transformer with the secondary connected to a dipole and hang it from a balloon; works fine and no ground or chassis. Start thinking. The dipole is a very long wire. The electrons are emitted from the ends only. The rest of the wire is the chassis. The very short dipole (0.05 wavelengh) should not work fine without ground. Babbling nonsense contradicted by about a hundred years of empirical observation. -- Jim Pennino Remove .spam.sux to reply. |
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The NEC only requires 5.261 (mm)2 for the protective down conductor
and 13.30 (mm)2 for the bonding conductor between electrodes. Since those sizes are at best a bad joke I was hoping to elicit best practice advise on what size the conductors should actually be as well as advise on how to accomplish the bonding of the interior single point grounding buss bar to the exterior grounding conductors and Grounding Electrode System. -- In what way is #6 a "bad joke?" Do you expect it to vaporize and set your roof on fire? |
Grounding for Gable end bracket & mast.
"John Gilmer" wrote in
net: Do you expect it to vaporize and set your roof on fire? Well, engineering of lightning protection is about design of a protection system that will, amongst other things, survive most events so as to continue to provide protection, and to minimise incidental damage. So, yes, down conductors adequately sized to manage the risk of the conductor "vapourising" is part of the scope, and physical design to minimise the risk of side flash causing damage is also part of the scope. It is interesting, no confusing, that you have two guides that give such different guidance. In Australia, we too have a standard for house wiring, and another standard for lightning protection, but they are not in conflict and our standard for lightning protection is well aligned with NFPA 780 on the downconductor size issue. Owen |
Grounding for Gable end bracket & mast.
Owen Duffy wrote:
"John Gilmer" wrote in net: Do you expect it to vaporize and set your roof on fire? Well, engineering of lightning protection is about design of a protection system that will, amongst other things, survive most events so as to continue to provide protection, and to minimise incidental damage. So, yes, down conductors adequately sized to manage the risk of the conductor "vapourising" is part of the scope, and physical design to minimise the risk of side flash causing damage is also part of the scope. It is interesting, no confusing, that you have two guides that give such different guidance. In Australia, we too have a standard for house wiring, and another standard for lightning protection, but they are not in conflict and our standard for lightning protection is well aligned with NFPA 780 on the downconductor size issue. Owen The thing is, AWG 6 wire won't vaporize or even melt or even get warm to the touch. There's not enough "action" (I^2 T) in a lightning stroke to do it. Remember that the current is high, but only lasts a matter of a 50-100 microseconds. Say you are using AWG 10 wire which has a resistance of 1 milliohm per foot. a 50 kA strike will dissipate 50E3^2*1E-3 = 2.5 MegaWatts.. which is big.. but for 50 microseconds, that's only 150 joules. That same foot of wire weighs about 1/2 an ounce (I'm sorry for the customary units, but they are what I remember off the top of my head AWG 10 is 1/10th inch in diameter, 1 ohm/kft, and 32 ft/lb).. or about 14 grams. Specific heat of copper is 0.38, so we have deltaT = 150/14 * 0.38 let's call it about 4 degrees C. I should note that this is a bit optimistic.. the AC resistance for a 50 microsecond pulse will be higher than for DC because of skin effect (skin depth at 1 MHz is 65 microns, 2.5E-3 inches, and it goes as the square root, so even at 100kHz, it's still not much more).. so the dissipation will be higher. But, you've got a long ways from 30C to 1000C (melting point of copper) and even farther to "vaporization"... (as a practical matter, you need kiloJoules to explode a 1 meter AWG 30 copper wire.. hundreds of joules just "melts" it. ) (note also that while the peak current might be 50kA or 100kA, the average current is substantially less..) Mechanical stresses from magnetic fields are a bigger concern, as well as "sideflash". |
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